(2).x = 158+162+163+168+168+171+179+179+179+18210 = 170
A類樣本方差為110[(158?170)2+(162?170)2+(163?170)2+(168-170)2+(168-170)2+(170-170)2
+(171-170) 2+(179-170) 2+(179-170) 2]
(3) C25C26A44 = 3600...(12分)